definition of
focal point

[1] #1 focal point n. a point of convergence of light (or other radiation) or a point from which it diverges. wn

[2] #2 focal point n. a central point or locus of an infection in an organism; "the focus of infection". wn

[3] #3 focal point n. the concentration of attention or energy on something; "the focus of activity shifted to molecular biology"; "he had no direction in his life". wn